PS> $empty = $null PS> $empty[0] Error: Cannot index into a null array. 因此,在尝试访问数组中的元素之前,请确保数组不是 $null。Count数组和其他集合具有计数属性,可告知数组中有多少项。PowerShell 复制 PS> $data.count 4 PowerShell 3.0 向大多数对象添加了计数属性。 你可以使用单个对象,它应该...
/// </remarks> /// <value>Array of patterns to search.</value> [Parameter( Position = 1, ParameterSetName = "PatternParameterSet", Mandatory = true)] public string[] Pattern { get { return patterns; } set { patterns = value; } } private string[] patterns; private Regex[] ...
$myArray = @(1, 2, 3, 4, 5) $index = 6 if ($index -ge 0 -and $index -lt $myArray.Length) { $element = $myArray[$index] Write-Host "数组元素: $element" } else { Write-Host "索引超出了数组的界限" } 在上述示例中,我们首先检查索引是否大于等于0且小于数组的长度。如果满足条件...
Change the location of an image manually in Powershell Change the value of an array element in ForEach loop? Changing contents of a text box multiple times in a powershell form Changing email Categories with PowerShell Changing file time Changing Local Group Policy and Local Security Policy via...
To display the third element in the $a array, type:PowerShell Copy $a[2] Output Copy 2 You can retrieve part of the array using a range operator for the index. For example, to retrieve the second to fifth elements of the array, you would type:PowerShell Copy ...
[string]::Join(" ",$array) } PS C:\> RemoveSpace("PowerShell 中文博客的网址为 :http://www.pstips.net") PowerShell 中文博客的网址为 :http://www.pstips.net Concat()将多个字符串拼接成一个字符串。 Concat()工作起来类似字符串操作符“+”,类似而已,总有区别。
If I want to add an element to an existing array, it might make sense to choose the next index number, and attempt to assign a value in the same way that I change an existing value. When I do this, however, Windows PowerShell generates an out of range error message. This command an...
You don’t have to set up a For Each loop or a For Next loop; PowerShell takes care of all that for you. Of course, with VBScript you don’t have to access all the items in an array; you can also access individual items by specifying the item index number. For example, suppose ...
基本查找和替换 在Vim中，可以使用:substitute（:s）命令来查找和替换文本。 要在Vim中运行命令，必须处...
In this example, we use theForloop to iterate through the$statesarray. The loop starts with the index$iset to 0 and continues as long as$iis less than the length of the array. Inside the loop, we access each state using the index$iand display a message with the state name. ...